Hi guys, my wife has recently bought a 2005 focus climate 1.6 petrol, but she is having heater problems. it only seems to blow hot air even when set to fully cold. any help or advice will be greatly appreciated

I have recently started having problems with my 2000 w reg fiesta starting. I have replaced the battery and had the alternator checked (which is working fine), but in the cold the car doesn't like starting. It will start straight away though when connected to another for a jump start. Any help or ideas please!!!!